There's plenty of anecdotal evidence that most champions are born into certain environments and encouraged early. Then, later on, they might get some assistance from their federations.

Many books have been written about what the X-factor is, what separates people who win big matches versus those who struggle. Some of it's innate, but there's a piece of it that's learned, embracing those moments.

One of Nadal’s strengths is that he’s so humble, that he’s surprised at what he has achieved, and that he has never bought into his greatness.

I really try not to read the tennis articles, because a lot of times they're guessing at how a player is feeling, and I like to keep myself kind of open minded about how I'm feeling, rather than have someone else explain to me what's going on.

America has an interesting global role, don't we? It certainly seems to be changing. Our government right now has a softer hand than we've had in the past, but I still think that we're the global behemoth.

It's really easy to find your friends when you're playing away. You have a close-knit group with you and everyone else is cheering hard for their side. There's more satisfaction coming away with a road victory.

Fear is an interesting energy that we all have to face. Some people step up and aren't afraid but still come up short. And some would rather cop out: "My shoulder hurts" or "I didn't give it my all." They can sleep at night.